duplicate board photo for convenience, harmonize file locations

embedded-workshop-book/src/hardware.md

@@ -56,7 +56,7 @@ Connect one end of a micro USB cable to the USB connector *J2* of the board and
 💬 These directions assume you are holding the board "horizontally" with components (switches, buttons and pins) facing up. In this position, rotate the board, so that its convex shaped short side faces right. You'll find one USB connector (J2) on the left edge, another USB connector (J3) on the bottom edge and 4 buttons on the bottom right corner.
 
 
-![Labeled Diagram of the nRF52840 Development Kit (DK)](hardware/nrf52840_dk_board.jpg)
+![Labeled Diagram of the nRF52840 Development Kit (DK)](img/nrf52840_dk_board.jpg)
 
 After connecting the DK to your PC/laptop it will show up as:
 
@@ -105,10 +105,14 @@ $ ls /dev/tty.usbmodem*
 /dev/tty.usbmodem0006834208031
 ```
 
-The board has several switches to configure its behavior. The out of the box configuration is the one we want. If the above instructions didn't work for you, check the position of the following switches (locate them using the diagram above):
+The board has several switches to configure its behavior. The out of the box configuration is the one we want. If the above instructions didn't work for you, check the position of the following switches:
 
 - SW6 is set to the DEFAULT position (to the right - nRF = DEFAULT).
 - SW7 (protected by Kapton tape) is set to the Def. position (to the right - TRACE = Def.).
 - SW8 is set to the ON (to the left) position (Power = ON)
 - SW9 is set to the VDD position (center - nRF power source = VDD)
 - SW10 (protected by Kapton tape) is set to the OFF position (to the left - VEXT -> nRF = OFF).
+
+For reference, here's the board picture again:
+
+![Labeled Diagram of the nRF52840 Development Kit (DK)](img/nrf52840_dk_board.jpg)